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Finding the Fourth Proportional to 77,705.10, 107,229.69 and 43,713

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Solution

The fourth proportional to 77,705.10, 107,229.69 and 43,713 is: 60,322.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,705.10 : 107,229.69 = 43,713 : x
  2. Step 2: Convert to fraction form
    77,705.10/107,229.69 = 43,713/x
  3. Step 3: Cross multiply
    77,705.10x = 107,229.69 × 43,713
  4. Step 4: Simplify right side
    77,705.10x = 4,687,331,438.97
  5. Step 5: Solve for x
    x = 4,687,331,438.97/77,705.10
  6. Step 6: Final answer
    x = 60,322.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.